[trenac]

To measure C02... http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm

KH at 4 is good, keep a eye on it to make sure it does not drop below 3.

Start out slow with C02 injection 1 bubble per sec is good.

Here is a link for PH, KH, GH... http://www.drhelm.com/aquarium/chemistry.html